Microbial respiration

Actinomycetes Microbial biomass Metabolic quotient Substrate-induced respiration Microbial biomass Soil organic carbon Dehydrogenase activity... 

The possible rate enhancement of G L oxygen transfer by viable respirating microbial cells was first studied by Tsao and his group (Tsao, 1968,1969 Lee and Tsao, 1972 Tsao et al, 1972) using a surface-agitated stirred vessel. 

I onsucrose Components from Storage or Damag e of Beets. Some nonsucrose components are associated with the conditions under which the beets have been stored prior to processing, as respiration products or products of microbial attack In either case they direcdy and indirectly reduce sucrose yield and may cause other processing problems. Glucose and fmctose have already been discussed and can derive from either source. 

Neutralization. Wastewater discharge usually requires a pH between 6 and 9. Exceptions are a biological process in which microbial respiration degrades acidity (acetic acid is oxidized to CO2 and H2O), or one in which the CO2 generated by microbial respiration neutralizes caustic alkalinity (OH ) to bicarbonate HCO. ... 

A general relationship between the composition of the water and that of the soHd minerals with which the water has come into contact during infiltration and in the aquifer can be expected. Biological activity, especially in the organic layer above the mineral part, has a pronounced effect on the acquisition of solutes. Because of microbial respiration, the CO2 pressure is increased. CO2 pressure tends to increase the alkalinity and the concentration of and other solutes. 

Burmell, P. L., Tait, D. E. N., Flanagan, P. W. and Van Cleve, K. (1977). Microbial respiration and substrate weight loss, I. A general model of the influences of abiotic variables. Soil Biol. Biochem. 9, 33-40. 

Miskimmin BM, Rudd JWM, Kelly CA. 1992. Influence of dissolved organic carbon, pH, and microbial respiration rates on mercury methylation and demethylation in lake water. Can J Fish Aquat Sci 49 17-22. 

Moodie AD, Ingledew WJ. 1990. Microbial anaerobic respiration. AdvMicrob Physiol 31 225. 

W. Cheng, Q. Zhang, D. C. Coleman, C. R. Carroll, and C. A. Hoffman, Is available carbon limiting microbial respiration in the rhizosphere Soil Biol. Biochem. 28 1283 (1996). 

Several authors have applied in situ pulse labeling of plants (grasses and crops) with C-CO2 under field conditions with the objective of quantifying the gross annual fluxes of carbon (net assimilation, shoot and root turnover, and decomposition) in production grasslands and so assess the net input of carbon (total input minus root respiration minus microbial respiration on the basis of rhizodeposition and soil organic matter) and carbon fixation in soil under ambient climatic conditions in the field. 

We conclude that recent advances in the use of tracers, albeit C or C, offer a solution to some of the technological difficulties in quantifying and separating microbial from root respiration. Combinations of these tracers may even overcome the last of the problems in discriminating between all three sources of COt released from soil. 

J. Swinnen, Evaluation of the use of a model rhizodeposition technique to separate root and microbial respiration in. soil. Plant Soil /65 89 (1996). 

H. Van der Werf and W. Verstraete, Estimation of active soil microbial biomass by mathematical analysis of respiration curves development and verification of the model. Soil Biol. Biochem. 19 252 (1987). 

A. Zimmermann, R. Iturriaga, and J. Beckcr-Birk, Simultaneous determination of the total number of aquatic bacteria and the number thereof involved in respiration, Appl. Environ. Microbial 36 926 (1978). 

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